# How can I resolve this problem?

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Deepesh Kumar Gupta on 4 Apr 2022
why am i getting this error?
Index exceeds the number of array elements. Index must not exceed 30.
Error in Inver_theta_ecc (line 23)
maxvalex= ex(idex);
Here is the code that have written-
clc;
clear all;
r=.011;
q=12;
sigma=5;
pi=3.1415926;
for i=1:1080
for k=1:68
I(k,i)=(FD(k,1)-ID(k,i)).^2;
end
I;
M=sum(I);
Ppost(i)=exp(-M(i)/(2*q^2))/(2*pi*q^2)^6;
end
Ppostmax= max(Ppost);
O= (Ppost./Ppostmax);
ex=-.009:.001:.02;
[maxvalPpost,idex]=max(Ppost);
maxvalex= ex(idex);
theta=0:10:350;
[maxvalPpost,idtheta]=max(Ppost);
maxvaltheta= theta(idtheta);
sum0=0;
for m=1:30
u(m)= ex(m);
sum1=sum0+u(m);
end
Meanex= sum1/30;
errorMAP_ex= 100*(.017-maxvalex)/(.017)
errorMean_ex=100*(.017-Meanex)/(.017)
for m=1:36
u(m)= theta(m);
sum2=sum0+u(m);
end
Meantheta= sum2/36;
errorMAPtheta= 100*(180-maxvaltheta)/(180)
errorMeantheta=100*(180-Meantheta)/(180)
x=test(:,1);
y=test(:,2);
z=test(:,3);
scatter3(x,y,z)
colormap jet

Torsten on 4 Apr 2022
The arrays "Ppost" and "ex" don't have the same number of elements.
This has the effect that "ex" has less elements than the value of the variable "idex".
Output numel(ex) and idex to see what's going wrong.
The same problem might appear for theta(idtheta).
Deepesh Kumar Gupta on 4 Apr 2022
@Torsten , thank you . The problem has been resolved.